Screw-FIX Increaser - Ø 175-200mm (25-175-MR)
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Fast deliveryWednesday, November 5th*
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Price matchWe’ll match like-for-like
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Delivery Information* +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Wednesday, November 5th. This is based on current lead times. Bear in mind that it is a busy time of year. If you need a product delivered by a specific time in the next 7 days, then please give us a call on 01670 206 999. Visit our Shipping Information page for more information.
About National Flues Ltd +
We began over 30 years ago as a fireplace shop in the North East. We now supply hundreds of trade professionals and thousands of retail customers, all across the UK, every month. We are still a family owned business, lead by the MD Neil, and always try our best to deliver the best possible experience. We also price match, so give us a call if you find this cheaper and want to buy from us. Visit our about us page to read a bit more.
At a Glance
- High-quality 0.6mm 316L stainless steel construction
- Increases the flue diameter by 25mm for a secure, seamless connection
- Compliant with Building Regulations Document J and T600 temperature rating
- Designed specifically for MI-FLEX 316 and 904 flexible flue liners
- Suitable for use with wood (<20% moisture), gas, oil, and smokeless coal
We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: sales@nationalflues.com
- Details
- Specs
- Install
- FAQs
The Screw-FIX Increaser - Ø 175-200mm is a top-quality accessory expertly designed for use with MI-FLEX 316 and 904 flexible flue liners. This 0.6mm stainless steel adaptor serves as a transitional joint, increasing the diameter by 25mm from a single wall connecting flue system to a flexible flue liner. Compliant with Building Regulations Document J, it's suitable for appliances operating at temperatures up to 600°C (T600 designation), including those using wood with less than 20% moisture, smokeless coal, gas, and oil.
The increaser must be securely fitted within a masonry chimney and is designed to ensure a gas-tight seal, using fire cement, ceramic rope, or high-temperature sealant. Regular maintenance and sweeping by a competent person are advised, particularly for solid fuel appliances.
SKU: 25-175-MR
| Technical Specifications | |
|---|---|
| Material | 316L Stainless Steel |
| Diameter Increase | 25mm |
| Size | Ø 175-200mm |
| Temperature Rating | Up to 600°C (T600) |
| Compatible Systems | MI-FLEX 316 and 904 flexible flue liners |
| Compliance | Building Regulations Document J |
| Fuel Compatibility | Wood (<20% moisture), Oil, Gas, Smokeless Coal |
What our experts say!
"The Screw-FIX Increaser - Ø 175-200mm is an exceptional product for ensuring a seamless connection between flue systems. With reliable nationwide delivery and options for both retail and trade customers, National Flues is your go-to supplier for top-quality flue and fireplace components."
The Screw-FIX Increaser is designed to connect a rigid single wall flue system to a flexible flue liner, increasing the diameter by 25mm.
National Flues is a reliable supplier of fireplaces and flue systems, known for competitive prices and dependable nationwide delivery. Catering to both retail and trade customers, National Flues offers secure online payments and trade accounts.
